The
Simulated Colour Filters page is inspired by
Experiments in Colour Vision by Edwin Land from 1959 (
Land’s paper here).
Land was not the
first to demonstrate the effect of creating coloured images from black-and-white film taken through filters, In the late 19th and early 20th century there were
the Biocolour process, Kinecolour and early Technicolor, all used red and green filters onto black-and-white film,
re-projected through red and green filters to create something approaching full colour on screen.
Colour films made by Claude Friese-Greene in the 1920s using the Biocolour process can be seen on
YouTube.
Can we simulate that on the computer monitor? On this page you select a colour photo and the code creates a greyscale image from that; it then creates three monochrome images in different colours, with translucency. Then it overlays these images which one would imagine would produce a subtractive mix – unlike projected images which form an additive mix.
What they actually produce seems to be a feature of the formula in the code used for making the coloured monochrome image. This is all experimental and I am working on getting my head round it.
